5445555444 has 72 divisors (see below), whose sum is σ = 15953228928. Its totient is φ = 1533954240.

The previous prime is 5445555443. The next prime is 5445555469. The reversal of 5445555444 is 4445555445.

5445555444 is a `hidden beast` number, since 5 + 4 + 4 + 55 + 554 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 5445555444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5445555443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134287 + ... + 170070.

It is an arithmetic number, because the mean of its divisors is an integer number (221572624).

Almost surely, 2^5445555444 is an apocalyptic number.

It is an amenable number.

5445555444 is an abundant number, since it is smaller than the sum of its proper divisors (10507673484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5445555444 is a wasteful number, since it uses less digits than its factorization.

5445555444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304445 (or 304440 counting only the distinct ones).

The product of its digits is 3200000, while the sum is 45.

The square root of 5445555444 is about 73794.0068298232. The cubic root of 5445555444 is about 1759.3303500112.

Subtracting from 5445555444 its reverse (4445555445), we obtain a palindrome (999999999).

The spelling of 5445555444 in words is "five billion, four hundred forty-five million, five hundred fifty-five thousand, four hundred forty-four".